I have done art reproductions for (painters) artists over a number of years, but only around 2-3 assignments per year. Thus, I do not have a lot of experience, but I have actually always delivered satisfactory results. I estimate I have shot maybe 50-60 pieces of different size, materials and colours.
As one should expect, I have been extremely careful with paralellism, even lighting and colour fidelity. Never had a problem.
Until now. I'm scratching my head here and would like someone with far more experience to give a few hints of what to try....
I have a small painting that is almost monochrome, but with tiny hints of blue here and there. (This blue not visible at normal viewing distance.) It contains an incredible amount of details and the high keys are normally in a silvery tone with a hint of metallic flakes. If you change the angle of light just the slightest the silvery tone changes to another, more goldish. This 'goldish' tone is totally absent viewing the painting straight ahead and my normal lighting from the sides. The blues also changes a lot depending on light angle.
On top of this, the painter has incorporated pieces of thin paperpipes here and there making the painting having an embossment, but this embossment is only a few mm which makes it invisible looking at it straight on, however, slightest movment of your own eyes sidways the character changes.
The painting is very cool, but a nightmare to photograph! My normal setup gives me a very flat and 'boring' image of an otherwise interesting piece of art in real viewing.
The only interesting light and result I have so far gotten is when I skip having the cam/painting paralell and shoot at an ever so slight angle to reveal the embossment and actually see both a hint of silver and gold at the same time. But this ofcourse I cannot do because the idea is to reproduce the artwork on paper...
I should add that this is a test!!!! from the artist himself. He says with a devilish smile that if I can produce this one to his liking I am to do a large amount of his paintings.
What would you try?